Antiskidding tread for motor-vehicle wheels.



W. A. F. MoOALLUMr ANTISKIDDINGTREAD FOR MOTOR VEHICLE WHEELS.

APPLIOATION FILED JUI JY 13, 1907.

Patented. Dec. 8,1908.

a-x-aw A NTISKIDDING- TREAD FOR MOTOR-VEHICLE WI-EEELS.

Specification of Letters Patentr Patented Dec. s, 1908.

Application filed July 13, 1907. Serial No. 383,640.

To all whom it may concern:

Be it known that I, WILLIAM A. F. M'c- OALLUM, a citizen of the UnitedStates, re-

siding at Germantown, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improv'ements inAntiskidding Treads for Motor-Vehicle Wheels, of which the following isa specification.

The principal object of my invention is to provide an anti-skidding orslipping device for motor vehicle-wheels, comprising sectional hinged orlinked devices interposed between the pneumatic portions of the tiresand the tread portion of the shoes embracing the tires, and which devicewhile of metal is flexible or yielding, in its arranged application andalso provlded with points or prongs which are arranged to be embedded inthe materiaLof the tire shoe in the formation thereof and projecting tothe exterior tread surface of the shoe to present such a biting orfrictional engaging surface in the travel of the tires of the wheels ofthe vehicle in contact with the ground as to offer required resistanceto slippery and damp ground or asphalt pavements so as to efiectuallyprevent more particularly skidding as well as slipping of the tiresunder the carrying load andimpelling power of the vehicle.

The nature and characteristic features of my invention willbe morefully, understood from the following description taken in connectionwith the accompanying drawings forming part hereof, in which Figure 1 isa transverse sectional view through a motor vehicle wheel, showing thepneumatic portion of the tire and the particular anti-skidding andslipping device of my invention interposed between the tire and shoethereof and provided with prongs or points embedded in the body of theshoe material andso as to project to the exterior tread surface of thesame and to compass only the tread ortion thereof. Fig. 2 is a viewpartly in p an and partly in broken section, showing the anti-skiddingand slip ing sectional device of my invention in app ication to thewheel tire as a structure, for em-' ployment in connection with motorvehiclewheels; and Fi 3 is a perspective of one section of the saiddevice detached from. the harbor therefor, between the tire proper andthe applied shoe or tread portion thereof, showing the detachedarrangement to one section of the said device.

Referring to the drawings 4, is the tire proper, arranged so as to beinflated and of any ordinary construction.

5, is the device of my invention, consisting of a series ofsubstantially trough-shape sections of metal linked or hinged at 6, toeach other, preferably at some distance from each end of adjoiningsections, as clearly shown in the broken section part of Fig. 2. Each ofthe sections has struck up from each side a series of prongs or'points7, at suitable distances apart, so that when the device isinterposedbetween the tire proper 4, and the shoe 8, of rubber composition orother gritty substance, the material of the shoe 8, Whichreally formsthe tread portion of the Wheel, will be thoroughly and uni formlyembedded in and about the points or prongs 7, as clearly shown in Fig.1, and

also so that these points will extend to the from the base of thesections hinged or linked to each other but they a e preferably arrangedas shown.

The series of sections of the device 5, are

arranged diagonally as to position between the tire 4 and shoe 8, asclearly shown in Fig. 2. Such arrangement of the sections, as describedenables the tread to give or yield under the carrying load and theimpelling power of the vehicle, uniformly and in unisonthe interposedsections of the device and theefi'ect of the points or prongs 7,projecting to the tread surface of the shoe of the wheel rendersellectivc thereby, the purpose for which my invention has been designed,in application to the wheels of particularly motor-vehicles, of slippingand skidding to be reduced to a' minimum.

Having thus described the nature and objects of my invention, what Iclaim as new and desire to secure by Letters Patent 1s:

1. A motor vehicle-wheel, comprising an inflatable tire, a tread orshoe, and an antiskidding and slippingdevioc, consisting of a series ofsections hinged or linked ,to each other and each provided with prongs'or points, said device interposedbetween the tire and shoe or tread andembedded in the latter so that the Frongs or points of the respectivesectionso the device extend to the exterior surface of the shoe or treadot' the Wheel, substantially as and for the purposes described. r

2. A motor \"ehic1e-wheel, comprising a tire, a tread applied theretoand an antiskidding and s ipping device, consisting of i a series ofsections hinged or linked to each other and prongs or points at suitabledistances apart formed integral therewith and said device arrangeddiagonally to the plane g of the tread or shoe portion of the wheel andbetween the tread and tire and embedded l in the body of the tread andthe points or i prongs 'proje :ing to the exterior surface of 5 saidtread, substantially as and for the i purposes described. 7

In witness whereof, l have hereunto set imy signature in'the presenceoftwo sub- 1 scribing witnesses.

\VILLIAM A. i F. UCCALLUM.

\Yitnesses:

J. WALTER DoL'GLAss, THOMAS M. SMITH.

